Detachable gun sling swivel



ug. 30, i949. P. v. MCKINZIE DETACHABLE GUN SLING SWIVEL Filed June 2l', 1948 INVENTOR Presorz. .VMcKnz e Patented Aug. BQ, 1949 UNITED STATES PATENT OFFICE l DETACHABLE GUN SLING SWIVEL ,Preston McKnz-ie, Portland, Oreg. Application June 21, 19478, Serial No. 34,290

(Cl. Litz- 85) t 6 Claims. v 1 Y This invention, in the broadest sense, relates to sling strap holding devices and, particularly, to detachable sling strap'swivels used with guns.

By way of preface to the objects of my invention, it is pointed outthat manylguns and particularly those used for hunting purposes are not provided with sling straps and that most guns which are provided with sling straps have their swivels permanently attached to the under part of the gun stock and the forearm portion of the gun. It is Well recognized that a 'sling strap for a gun is a desirable accessory and is used to carry the gun when traveling in a Yhunting area or to assist in steadying the gun during its tiring. However, many gun owners prefer to store their guns either in display cases or on walls for decorative purposes and desire to have their guns displayed without a gun sling, and with the present and ordinary type of swivels, not being re- .'movable, they project from the under part of the gun stock and forearm thereby detracting from the display even if the vstrap'is removed from these stationary swivels.` VIt is also often desirable to quickly disengage either one or both ends of the gun sling from the gun, but where the gun swivel is permanently affixed to the gun, the only v.possible way ofl removingV the strap is by unbuckling the same and removing it from the loops or balls which are a part of the swivels.

It is, therefore, the principal object of my invention to provide 'swivels which can readily be disengaged from a gun and thuspermit the freeing of one or both jends of a sling strap, if desired,

together'with the depending swivels, or tosecure a sling strap and swivels to the gun for firing or carrying purposes. y j s 4 In order lto carry out the-principal object of lmy invention Vand as a corollary thereto, another object of the invention is to provide means in a gun to which a pair of sling strap swivels may be releasably but securely locked.V

Another object of the invention is to provide a pair of swivels which, in practically all respects, possesses the. same `characteristics as a standard type of i-lxed gun swivel but whichY can readily f be disengaged from a gun.` 1

Still another object of my invention is to'provide a pair of detachable swivels which possesses means for readily detaching the same from the gun, but which prevents accidental ,or casual disengagement therefrom.

Additional objects and features of the invention will readily come to mind as the detailed description of the invention is'unfolded and which may be in general` summed up by the creation of a 2 detachable sling strap swivel for guns which is simple but durable in construction and, while inexpensive, is practical and eiiicient to use. Y

The accompanying drawing which forms a part of this specication illustrates the preferred structural features of my invention and for a complete understanding thereof the detailed description, which follows, must be read in connection with the disclosure in said drawing wherein identical reference characters indicate corresponding parts and in whichz Fig. 1 is an elevational view of my invention, partly in cross section and partly broken away, to show the structural characteristics of the invention' and its relation to a gun, with the swivel assembly in locked position;

Fig. 2 is a section, taken along line 2--2 of Fig. 1 and looking in the direction indicated,

showing the position of the spherical members in relation to the annular groove formed in the vswivel receiving casing, when the swivel assembly is in locked position;

Fig. 3 is an elevational view of the invention,

Apartly in cross section and partly broken away,

showing the structural characteristics "of the invention prior to the insertion of the swivel as- 30 Vfurther compress the resilient member; and

Fig. 4 is a sectional view taken along line 4--4 of Fig. 3 and looking in the direction indicated,

showing the position of the spherical members Vwith relation to the releasing pin or button and the swivel receiving casing prior to the insertion of the swivel assembly into said casing.

Referring now to the figures in the drawing, reference character A represents the portion of a gun having the usual wooden stock and forearm portion. Since the swivels used with the stock and the forearm portion are, in all respects, the

4same except for the method of fastening, the portion of the gun herein represented will be considered as the stock for the purposes of descrip.- tion; and since each swivel assembly possesses the .same structural characteristics andY performs identical functions, the description of one will .suice for both. A cylindrical socket or recess I is formed within the under portion of the stock A in substantially the same location customarily used for a fixed swivel. A swivel receiving casing v2 is placed snugly within this recess so that it "I2 and entersoavity I0.

3 tour and has the interior portion of the base 4 rounded to correspond to the contour of the outside surface of the swivel member shortly to be described. An axial opening 5 is provided through the base 4, and a screw head receiving countersink surrounds this opening to thus provide a smooth interior base after a iiat headed threadable member 6 secures the swivel receiving casing to the stock. A similarly satisfactory method of anchoring a swivel receiving casing to the forearm is provided. A semi-spherical annular groove 'I is formed within the interior of casing 2 adjacent to the open end of the casing. While in the preferred embodiment, the groove is shown as semi-spherical in cross sectional contour, it would necessarily have a contour complementary to the outside contour of theV locking members which are a part of the swivel assemblyA yet to be described if the same were not spherical bodies. The swivel assembly, generally designated by 'reference character B, is shown in Fig. 1 locked Ybase 9 yis complementary to the inner contour of base A.' Member 8 has an axially positioned deep cylindrical cavity I0 therein adapted to receive Y a releasing pin or button I I, the structural characteristic of whichw'ill be described forthwith. Member sh'as a head I2, the annular shoulder I3 of which is seated upon the top of casing 2 Vwhen the swivel assembly B is in locked position.

Afpair. of transverse 'openings I4, in direct alignment with each other,"passes through the head These openings are adapted to receive and Amovably secure a loop or bail.- I5 therein, which, in turn, receives a Vslingstrap I6, the structural characteristics of which scribed in detail. A concavesur'face I'I is formed Yon'the top of. the -head I2 andsurrounds" the Vtop of cavity IIl.v Also formed in member 8 is a plurality of transversely positioned openings I8, all of which are positioned in the same plane, and each of which is adapted `to .receive a spherical locking member, such as bearings I9. The outer periphery of Veachl of these openings is slightly crimped `or beaded, asshown at 20, to prevent the completev extrusion of the spherical bodies through said openings.

Releasing Vpin or button II is cylindrical in shape and is adapted to move freely within cavity I0 of member ii.A A peripheral groove 2| is formed approximately medial of the pin I i and possesses the same or the equivalent cross-sectional contours of the annular groove formed in casing 2. This groove 2I is adapted to receive the spherical locking members, such asbearings I9 when the swivel assembly B is in the position shown in Fig. 3.. Immediately below groove 2l, pin II has a somewhat frusto-conical tapered peripheral surface 22 ending in a band 23.

A recess 24 is formed in the base of pin I I, and a resilient element, such as a coil spring 25, ts therein, and` when the releasing pin II is placed into normal position within cavity IIl and in cooperative relation to the spherical members I9, spring 25 is maintained in a partially compressed condition, and the spherical members I9 are retained in openings I8 and in annular groove 'I of casing 2 lockingY the swivel assembly B to the casing as shown in Fig. 2. When pressure is applied to -the pin II, spring 25 is further compressed, as shown in Fig. 3, and the spherical members I9 are thereby permitted to leave annular groove 'I and enter the peripheral groove 2| formed in pin I I releasing the swivel assembly B from casing 2.

It should be noted that the swivel assembly B, when in locked position to casing 2, is capable of rotation, the groove 'I and openings I8 providing a bearing race for the .swivel assembly.

It is understood that changes may be made in the structural characteristics of the invention, as disclosed herein withoutl departing from its spirit. It is, therefore, pointed out that the invention herein described and illustrated is to be considered as not limited thereby but only by the scope ofthe following claims, in which I claim:

Y 1. In a sling strap anchoring device, in combination with a gun having a recess within the under part of itsHstock-and the forearm, respec- 'tivelyga swivel receiving-casing coni-ined within 'each of said recesses, each'of said casings having an annular grooveformed within` its interior, Vastrap holding swivelv member movably disposed within each of 'said casings,each of said Amembers having an axially disposed cavity therein vand a-plurality of l'openings .through its wall in 'equally spaced lateral alignment with each other, and means associated-witheach of said members and cooperating Lthroughl said plurality of fopenings anddisposed inisaidannular groove formed yin each of 'saidcasirigs 5to rele'asably"anc'liorV said member to ytheir' respective icasings.

2. The combination'Lofr elements. defined in f rclaim "1' wherein the releasable anchoring means includes `a vplurality 'of Vspherical elements 'convfinedl withithe openingslfcrmed-through the vwalllofthe respective ,swivelmembers fand conilnable partially' within' the-anriularf groove of vthe respective frcas'ings Vwhen thefsw'ivel "member is locked toits respective casing. Y Inja'sling vstrapanchpring device,Y a swivel 'member vadapted to 'telescopicallyenter into a casing and 'be releasably `locked in rotatable relationsl thereto, said swivel :member havingan axiallydisposed'cavity therein'and a' plurality of 4transversely and Alaterally disposed equally spaced openings formed through'V the 'wallsof saidlmember, a .pluralityv oi sphericalbodies moyablewithin said openings and adapted to. engage with the casing,` and means. movableV within. the cavityV of said swivel member vadapted .to normally retain said sphericalfbodiesin .engagement '.with said casing. Y y Y.

4. In a sling'strap anchoring devicef a sling strap'swivelhaving a body portionfa strap supporting bail-swingably secured thereto; said body .portion having an'axially disposed Vcavity thereinrand a plurality 'of-openings Yin its'wall, a plurality of sphericalV bodies Lpartially'conined in said openingsand `transversely' movable'relative to the rcavity; and fmeansfconfined within the Vcavity for controlling Vthe.v 'transverse' movement yofisaidbodiesi f 5. In a sling strap swivel; in Acombination with -a casing having 'an #annular .groove therein, a swivel membenra strap supporting iba'il 'secured thereto,l thet body portion of said swivel' member having 'an 'axiallyfdisposed- 'cavitytherein 1 and a plurality of openings in .its'wallf'a plurality of spherical bodies transversely movable within vthe 'openings in said :member relative tothe annular groove of the casing,:a releasing pin movablyfd'isT Jposedvwithin said cavity and 'co#operativelyvr as- 6 socated with said spherical bodies, and resilient REFERENCES CITED means compressed within said cavity and against said pin to normally retain said pin against said spherical bodies and conne them in the annular groove of said casing.

6. The combination of elements deined in The following references are of record in the fue of this patent:

UNITED STATES PATENTS claim 5 wherein said releasing pin has a periph-h lurm M e elggle A I Dzatelg eral groove midway of its body and an inverted 2078591 Sprague An" 27' 1937 frusto-conical base portion to cont-rol the posi- 2102'964 Mossberg Dec211937 tions of the spherical bodies with relation to the 10 swivel member and easing. FOREIGN PATENTS Number Country Date PRESTON V MCKINZIE- 292,150 Germany Aug. 1o, 1915 

